There are two activities for students to try: the Seasons Activity and the Scavenger Hunt. In the Seasons activity users order strips of the earth by month. Hints and scaffolds are built into the to...More: lessons, discussions, ratings, reviews,...

Each figure is made up of three traits: shape, number, and color. Click on any two figures to trade their locations. Rearrange the figures in the grid so that figures bordering each other share at lea...More: lessons, discussions, ratings, reviews,...

Guide the ball through all eight golden tunnels. Click on two sections of the maze to transfer water from one section of the maze to the other. Clicking on a red valve will open and close a section. More: lessons, discussions, ratings, reviews,...

Classroom activity (also called the Masonry Problem; a variation on polyominoes) to be explored through manipulatives (dominoes). Students explore different possibilities of making brick walls with an...More: lessons, discussions, ratings, reviews,...

Student page for the classroom activity (also called the Masonry Problem; a variation on polyominoes) to be explored through manipulatives (dominoes). Students explore different possibilities of makin...More: lessons, discussions, ratings, reviews,...

A classroom activity (similar to Pentomino + 1 = Hexomino; a variation on polyominoes) to be explored through manipulatives (paper dominoes). Students explore whether it is possible to cover a 6x5 gri...More: lessons, discussions, ratings, reviews,...

Student page for the classroom activity (similar to Pentomino + 1 = Hexomino; a variation on polyominoes) to be explored through manipulatives (paper dominoes). Students explore whether it is possible...More: lessons, discussions, ratings, reviews,...

As a problem solving activity, students determine how many squares are on a checkerboard. Students drag highlighted squares of various sizes around the board to count the number of squares. They enter...More: lessons, discussions, ratings, reviews,...

A classroom activity (also called 1000 Lockers) to be explored through the use of manipulatives and a ClarisWorks spreadsheet. Students then look for patterns and write the answer algebraically.More: lessons, discussions, ratings, reviews,...

Investigate the famous Locker problem. Invent your own version! This applet has a feature that allows students to investigate some of their own versions of the locker problem. For example, instead of ...More: lessons, discussions, ratings, reviews,...

A classroom activity (also called 1000 Lockers) to be explored through the use of manipulatives and a ClarisWorks spreadsheet. Students then look for patterns and write the answer algebraically.More: lessons, discussions, ratings, reviews,...

These guided, interactive activities present sequences of geometric patterns and encourage students to generate rules and functions describing relationships between the pattern number and characterist...More: lessons, discussions, ratings, reviews,...

This eModule presents sequences of geometric patterns and encourages students to generate rules and functions describing relationships between the pattern number and characteristics of the pattern. S...More: lessons, discussions, ratings, reviews,...

If you have a checkerboard that is 50x50 with small squares inside it, how many squares will there be all together? Students use a Java applet from the Freudenthal Institute to think about the ques...More: lessons, discussions, ratings, reviews,...

This material is based upon work supported by the
National Science Foundation under Grant DUE-0226284.
Any opinions, findings, and conclusions or recommendations
expressed in this material are those of the author(s)
and do not necessarily reflect the views of the
National Science Foundation.